20 Things You Didn't Know About Star Wars: Revenge Of The Sith
2. The First Draft Contained HUGE Story Differences
The first draft of the film's script contained massive story differences from the final shooting screenplay.
For starters, during the scene where Palpatine reveals his true nature to Anakin, Palpatine originally confirmed that he manipulated the Force to cause Anakin's creation, effectively being his "father." Lucas ended up cutting it because he felt it was too similar to the Vader-Luke parentage twist.
Though the idea was ultimately explored in a more recent comic, Darth Vader #25, Lucasfilm Story Group have themselves confirmed that this isn't at all true.
Elsewhere in that original draft, a teenage Boba Fett was to be the one who killed Mace Windu during Order 66, in revenge for killing his father Jango (Temuera Morrison), but Lucas changed Windu's killer to Palpatine after feeling Boba was too young to believably kill a Jedi Master.
And finally, Padme was originally going to survive the events of the film and go into hiding with baby Leia on Alderaan. In the end, Lucas felt that Padme needed a dramatic on-screen death rather than dying uneventfully off-screen.